项目之前都是好好的，运行正常，但不知啥原因，突然不能正常运行，所有访问都报这个错误码，其它项目可以正常运行，rn在网上找了一圈，都是说建立web项目时生成servlet-api.jar，jsp-api.jar与tomcat的包有冲突，比tomca版本低rn但我没有发现我的项目有重复的这些包，大家没有遇到这个问题rnrn2014-3-31 9:38:37 org.apache.jasper.compiler.TldLocationsCache tldScanJarrn信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.rn2014-3-31 9:38:39 org.apache.catalina.core.StandardWrapperValve invokern严重: Servlet.service() for servlet [jsp] in context with path [/MobileHospital_bank] threw exception [Unable to compile class for JSP: rnrnAn error occurred at line: [36] in the generated java file: [D:\apache-tomcat-7.0.42\work\Catalina\localhost\test_project\org\apache\jsp\index_jsp.java]rnThe <em>method</em> getJspApplicationContext(ServletContext) is <em>undefined</em> for the <em>type</em> JspFactoryrnrnStacktrace:] with root causernorg.apache.jasper.JasperException: Unable to compile class for JSP: rnrnAn error occurred at line: [36] in the generated java file: [D:\apache-tomcat-7.0.42\work\Catalina\localhost\test_project\org\apache\jsp\index_jsp.java]rnThe <em>method</em> getJspApplicationContext(ServletContext) is <em>undefined</em> for the <em>type</em> JspFactoryrnrnStacktrace:rn at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:103)rn at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:366)rn at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:468)rn at org.apache.jasper.compiler.Compiler.compile(Compiler.java:378)rn at org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)rn at org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)rn at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)rn at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)rn at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)rn at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)rn at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)rn at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)rn at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)rn at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:96)rn at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)rn at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)rn at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)rn at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)rn at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:611)rn at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)rn at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)rn at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)rn at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)rn at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)rn at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)rn at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)rn at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)rn at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)rn at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)rn at java.lang.Thread.run(Thread.java:662)rn

[code=Java]严重: Servlet.service() for servlet jsp threw exceptionrnorg.apache.jasper.JasperException: Unable to compile class for JSP: rnrnAn error occurred at line: 28 in the jsp file: /<em>method</em>.jsprnThe <em>method</em> getPartNum() is <em>undefined</em> for the <em>type</em> UserDaoImplrn25: rn26: rn27: rn28: tolNum:rn29: rn30: rnrnrnStacktrace:rn at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)rn at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)rn at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:439)rn at org.apache.jasper.compiler.Compiler.compile(Compiler.java:334)rn at org.apache.jasper.compiler.Compiler.compile(Compiler.java:312)rn at org.apache.jasper.compiler.Compiler.compile(Compiler.java:299)rn at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:586)rn at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)rn at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)rn at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)rn at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)rn at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)rn at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)rn at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)rn at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)rn at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)rn at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)rn at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)rn at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)rn at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)rn at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)rn at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)rn at java.lang.Thread.run(Thread.java:619)[/code]rn我明明在UserDaoImpl中定义了getPartNum（）的方法，但是为什么回出这样的错误呢？

在使用org.w3c.dom.Node.getTextContent()出现了The <em>method</em> getTextContent() is <em>undefined</em> for the <em>type</em> Node的提示，产生原因在j2ee项目中的xml-apis.jar下的org.w3c.dom干扰了Java的类查找，所以我们只需要把jdk的优先级调整到它之前就可以了。

该方法存在为什么报The <em>method</em> querySubCategory(int) is <em>undefined</em> for the <em>type</em> GoodsCatedao错误呢？rn具体错误：rn2010-7-7 18:24:22 org.apache.catalina.core.StandardWrapperValve invokern严重: Servlet.service() for servlet default threw exceptionrnjava.lang.Error: Unresolved compilation problems: rn The <em>method</em> querySubCategory(int) is <em>undefined</em> for the <em>type</em> GoodsCatedaorn The <em>method</em> querySubCategory(int) is <em>undefined</em> for the <em>type</em> GoodsCatedaorn The <em>method</em> querySubCategory(int) is <em>undefined</em> for the <em>type</em> GoodsCatedaornrn at kaiqi.goods.actions.GoodsCateAction.searchJLExecute(GoodsCateAction.java:531)rn at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)rn at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)rn at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)rn at java.lang.reflect.Method.invoke(Method.java:585)rn at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:404)rn at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:267)rn at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:229)rn at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:221)rn at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)rn at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)rn at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)rn at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:150)rn at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:48)rn at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)rn at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)rn at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)rn at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:123)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)rn at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)rn at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)rn at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:167)rn at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)rn at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)rn at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)rn at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:105)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)rn at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)rn at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)rn at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:83)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)rn at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)rn at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)rn at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:207)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)rn at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)rn at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)rn at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:74)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)rn at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)rn at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)rn at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:127)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)rn at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)rn at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)rn at org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(ProfilingActivationInterceptor.java:107)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)rn at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)rn at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)rn at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:206)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)rn at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)rn at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)rn at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:115)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)rn at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)rn at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)rn at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:143)rn at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvoc

我用delphi6开发数据库的时候rn先用TADOConnection建立了一个连接，用的是ODBCrn然后用TADOTable建立了一个表，当我把Active属性设置为true的时候，运行程序，提示错误信息"Could not convert Variant of <em>type</em>(null) into <em>type</em>(String)"，我已经将delphi6打了补丁sp2rn开发环境是windows2000+Sp2，sql2000rn请大家帮忙啊！！！！！！！！！！！！

getTabHost() is a <em>method</em> of TabActivity not Activity. You'll need to extend that instead of Activity for the <em>method</em> to be defined
in your object.
MainActivity 继承自Activity ，当使用 getTabHost()，会提示get